Question

Which is an example of substances reacting chemically?

a. Paper being cut into small pieces
b. Chocolate melting in a pan
c. Flour and sugar mixed together in a bowl
d. Iron and oxygen forming rust

Answer 1

D

Step-by-step explanation:

Iron and Oxygen forming rust is a chemical reaction. It creates something new and it changes its chemical formula. Both signs of a Chemical Reaction

Answer 2

D

Step-by-step explanation:

Iron and oxygen forming rust.